non·con·duc·tor /-kənˈdʌktɚ/
  不傳導體,絕緣體
  non·con·duc·tor /ˌnɑnkənˈdəktɚ/ 名詞
  Non·con·duct·or n. Physics A substance which does not conduct, that is, convey or transmit, heat, electricity, sound, vibration, or the like, or which transmits them with difficulty; an insulator; as, wool is a nonconductor of heat; glass and dry wood are nonconductors of electricity.
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  nonconductor
       n : a material such as glass or porcelain with negligible
           electrical or thermal conductivity [syn: insulator, dielectric]
           [ant: conductor]